Check-hinoe



E. FRANCKAERTS'.

CHECK was. v APPLICATION F ILED NOV. 22,1919 Relssued Apr. 12, 1921. Y

"N VENTDR E. FHANCKA ER T5 E. FRANCK AEBIS- CHECK HINGE. APPLICATION FILED nov.22. I9l9- 15,082. a sunssun 3. FIG. 5'

Reissued Apr. 12, 1921.

IN VENTDR E. FFANL'KAERH view with the UNITED sra'res m FRAHGKAERTS, OF SAN FRANCISCO, CALIFORNIA. I

CHECK-H117 GE.

Specification of Reissued'Letters Patent. Reissud Apr. 12, 1921.

Origlnalja ljllflfl, dated October 15, 1918, Serial No. 187,804, filed-August 23, 1917. Application for t'eilflu: filed Fovember'22, 1919. Serial No. 339,962.

To all whom it may concern:

Be it known that, I, EMILE FRANoKAER'ls, a citizen of the United States, and a resident of San Francisco, in the county of San Francisco and State of California, have invented new and useful Improvements in Check-Hinges, of which the following is a specification.

My invention is an improvement in check hinges, and has for" its object to provide a hinge of the character specified, which will automaticall close the door when it has been opened and released, and wherein checking'mechanism is provided for cushioning the closing movement of the door.

In the drawin Figure 1 is a iant view of the improved hinge,-showing the parts in one position; Fig. 2 is a similar view showing the parts in another position; Fig. 3 is a top plan view; Fig. 4- is a longitudinal section, with the parts in one posit1on; Fig. 5 is a similar parts in another position; Fig. 6 is a-front view of the lunger; Figs. 7 and 8 are sections on the ines 7-7 and 88 of Fig. 4; Fig. 9 is' an enlarged vertical section' or the piston; Fig. 10 is a top plan view of a modified construction for permitting the door to swing in either direction.

In the embodiment of the invention shown in Figs. 1 to 9, inclusive, the hinge consists of a easing composed of a section 1 forming a chamber for liquid, having connected with the lower end thereof a section 2 forming a chamber for holding the spring which closes the door, the said section having threaded engagement with the section 1. A partition plate or disk 3 is threaded into the lower end of the station 1, separating the said section from the section, 2, and the spring 4- is connected. at one end with the section rotate with respect thereto is. eld to thecollar 6 by means of a flanged sleeve 8 which has threaded engagement with the upper end of the section 1, and the flange chamber;

extends inwardly over an annular shoulder 9 on the collar 7.

A cap 10 has threaded engagement with the upper end of the collar 7, andscrews 11 and "12 are threaded into the-outer ends of the cap 10 and pin 5, respectively. One of the hinge leaves 13 is secured to the section 1 ofthe casing, and the other leaf 14 isdetachably connected with the cap 10 and with the pin 5 by means of the screws 11 and 12. Referring to Fig. 2 it will benoticed that the leaf 14 has laterally extending lugs 15 at its-ends which engage the ends of the cap'a'nd the pin 5, these lugshaving 0penings through which the screws 11 and 12 extend. In order to hold the hinge leaf in proper position with respect to the cap and pin, screws 16 and 17 are passed through. the leaf into engagement with the collar 7 and the pin 5, respectively. It will be noticed that the'pin has a head outside the section'2', and this head has radial openings 18 which may be engaged by an instrument to turn the pin to properly tension the spring. The screw 17 engages one of these openings, passing through a lug 19 from'the .80 leaf 14. e

A ball bearing 20 is arranged between the collars 6 and 7 and a plunger rod 21 is mounted to slide in the two collars. This rod has its lower end reduced as shown at B5 22, and a piston 23 is connected with the said lower end. This piston has a ring'24 for making a tight joint in the,.section of the casing, and two ports 25mm 26 are provided in the piston for-permitting the 90 passage of the liquid "which is held in the ()ne of these ports is controlled by a ball check valve 27, which is adapted to close the port when the piston moves downward, and the port 26' is provided 95 with a 'reliefvalve 28 which isuormally held closed by'a spring 29.

It will be noticed hat the upper end of the valve '28 is conical or tapered and cooperates with a similarly shaped seat, 'while 100 the lower end of the valve is provided with a head'30 fitting into a rabhct or counterbore at the lower end of the piston. The spring 29 is arranged between the head and the piston and normally holds the valve 106 closed. A by-pass 31 is provided in the wall of the section 1 the said pass leading from the lower end of the chamber to near the upper end, and a valve is provided for a, the capacity of the lay-pass, the said. yauo 32 being screw threaded into the upper end of the passage- 31 and having 5 a groove or passage 33 through which the lit uid may pass.

V hen the piston moves lou'nn mrdl the H port 35 is closed by the check rah-"e 2?. and

(Eli-quid must pass by way of the. hy-pass from below thipiston to ulnar-c the same.

The downward movement. of the piston will thus be checked and cushioned.

A stop 3- is provided at thenipper end of the rod 21 for limiting the downward movement of the Dist-U1] to the position shown in Fig. 4. the said stop being in the. form of washers held to the upper end of the rod by aunt and adapted to engage an annular shoulder formed by counterlmring the upper end of the collar 7. The plunger rod 21 has a spiral groove 35, which Is :uiapltal to be engaged by ftlllg 36in the cou'ntei'hore of the collar 7 to constrain the plunger to move downwardly when the collar is To tated, and the plunger is prevented 'from turning with the collar 7 by means of lugs 37 which engage within vertical groovc's in the plunger rod. A coil spring 39 isa'r ranged between the upper face of the plun- 80 get and the lower end of the collarfii, the

said spring acting to move the plunger and the piston upwardly.

In'operation, whenthe door open the parts are in the position of Fig.5,the spring l living under roznprcssion and the plunger being ifted. The opening; of thedoor lifts the plunger; and when the dot closed by the spr ng .1, the plunger is forced downwardly because of the spiral groove, and

40 since the check valve 27 is '-lo.-aed'the liquid which must pass by way of the bypass is limitedand the movement of the door closing will be cushioned. Should the door he forcibly closed the valve 28 may yield to prevent injury to the parts.

It will be noted that a screw (3 is passed through the sleeve 8 and the tiangc'of the casing section 1 into engagement with the 'collar 6. to prevent the collar 6 and the sleeve from turning with respectto each other.-

I claim:

1. In a hinge a easinp ha ing a chamher for liquid, :1 piston movable in the eas- 66 ing and having: a chori: alve for permitting the liquid to flowfreely in one direction, said casing having a bypass 'for the liquid and means outside the casing fin'eon- I trolling the ay-pass, a spring acting nor mally to move the piston in the said one direction, a rotatable-clement in connection with the hinge at one end thereof and connected to the piston to move the piston against the resistance of the spring, said ])lSl;()!1'llfl"iD a relief valve, spring controlled to yield at apredetermined pressure when the check valve is'closed, a rotatable element in connection with the hinge at. the other end, and a closing spring in the easing: and connected with the casing and. the last named rotatable element. 3

ln a hinge, a casing having a chamber for liquid, :1 piston movable in the casing and having a check valve for permitting the liqu-id'to flow freely in one direction, saidcasing having, a by-pass for the li uid and means outside the casing for coutro ling-the hy-pass, a spring acting normally to move th piston in the said one-direction, and a ro-.

tatable element in connection with the hinge at one end thereof and conncetedto the piston to movethe piston against the resistance of the. .spring, said piston having arelief valve, spring control closed. o In a hinge,' a casing having achamber for liquid, a-.,;piston movable'in the casing,

and l|aving-'a. check'-valve fat-permitting the liquid to.fio\v freely -in one direction, said rasing having why-pass for the liquid, a rotatable element in connection with i.the hinge and connected to the piston to move the pifston and afflanged sleeve having-a threaded engagement with saidcusin'g'and a flange engaginga shoulder on-said rotatable cleme'nL' LA cheek hinge comprising hinge leaves adapted to be secured to adoor and the jambwherefor, at-casing with which one of said leaves. is rigidlyconnected; a 5 ring housing rotatable upon said casing; an connected with the door hinge leaf, :1 spring housing fixed to said casing, a spring in said last named housing, a member in said housing connect-ed with and adapted-to be rotated by said spring ;means for connecting said membeiy'w'ith the door hinge lcat ed to yieldat Ta rado-- termined pressure when the'check valve 1s and means to reta'rdelosing movement of the khan-mounted in the casing, and operatively associated with the first named spring housing, said no named means inrludin a plunger provided with vertically extending helical grmn-eserossing each other and lugs movable with said rotatable housing and entcring: said grooves.

EMILE FRANCKAERTS. 

